Mexico’s National Autonomous University of Mexico (UNAM) suspended admissions after a suspected cheating scandal linked to remote administration of its undergraduate entrance exam. UNAM opened an investigation after 16.3% of candidates scored 100 points or more, far above the 3.5% average from 2021 to 2025. The university said the remote test format—allowing candidates to take the exam remotely with camera and microphone monitoring—may have contributed to anomalies, despite use of an AI detection tool. For prospective applicants, the resolution is immediate and high stakes: UNAM will require applicants who met passing thresholds this year or over the prior five years (about 58,000) to retake a controlled exam entirely in person. The university blacklisted 3,000 papers but left all prospective students in limbo while it planned the new approach. The episode illustrates how remote proctoring and AI detection tools can face limits when admissions integrity is under pressure, and how universities may respond by shifting to higher-control in-person testing to protect legitimacy for competitive programs like law and medicine.